Friction



J. F. 0.CONNOR. FRICTION SHOCK ABSORBING MECHANISM.

APPLICATION FILED SEPT-23. 191B.

.Patented fune 17,

UNTTED STATES PATENT cierren.

JGHN O'CONN'GB.. 0F CHICAGO, ILLINOIS, ASSG'NOR T0 WILLIAM H, MINER, 0F CRAZY,

.f NEW YORK j FnmTIoN sHooIcABsoniaNe MECHANISM.

1,307,312, specification of Letters Patent. Patented June 17, 1919,

Application led September 23, 1918. Serial No. 255,241.

` To 7l r:ciw/1L it may concern.'

Be it known thatl, JOHN F. OCoNNoR,

a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a. certain new7 and useful Improvement in Friction Shock-Absorloing lilcchanism, ot' which the following is a fall, clear, concise, and exact description, reference being had to the accompany ing drawings, forming a part of this speciiication.

This invention relates to iniproven'ients in friction shock absorbing mechanism.

Cnc object of the invention is to provide a friction shock absorbing mechanism of simpl@ and economical construction and moreparticular-l)Y adapted for useVv in railwny t raft riggings.

nether and more specific object of the invention is to provide :i friction shock absoi-bingameclianisin employing a set of novel combined wedge and friction elements hav-Y infr self-contained releasing means.

n the drawing forming` a part of this spccication, Figure 1 is a part vertical,I 'longitudinal section -iart elevational view 'of s riortien of a railwii.' draft ri inr .Sbwiing my. improvements in connection therewith. Fig, 2

is a vertical, transverse, sectionalview, j taken on the line 2 2 of Fig. 1. And Fig. 8 is a detiii, perspective view of the set ot combined friction wedge elements.

In said drawing, 10*10 'denotechannel draft sills of a railway car to the inner faces of 'which are secured the iisual front and rear sets of stop lugs. The draw ber 11 is operatively connected with the shock absorbintY mechanism by the nsual forni of,

yoke 1Q and the parts are supported by a. detachable saddle plate 13. A front follower 14 is also shown interposed between the draw bei' and t-he'ront'end of the shock absorbing mechanism proper.

The shock absorbing mechanism, as shown,

includes a. cast-iure niain spring B, fric-v tion elements @-0, release spring,r l) and rctaiuiig holt E.

The casting is :formed fit its front end with ai rectum-alsnfriction shell 15 and rearwardly thereof with. e spring casing 16. At ite rear end, thc casting A may be widened, es indicated at 17-17 in Fig. 2. in order to adapt the costing to better act face 20 and a smziller'end face 21 sit -friction elements C-C of identical forni.

Each et said elements C is provided with a pair of longitudinally extending friction faces 18 and 19 in planes at rig t angles to each other so :is to coperate with two ad jacent Het friction faces of the shell l5. ii addition, each element C has one large end the oppos-ite end of the element. 'Each element C has also two-triangularvshaped feces 22 and 23 as shown in Fig. 3. The various faces 18, 19 and 20 are in the form of squares with triangular sections cut of? from one corner thereof, thus providing;r coperating sets of wedge faces, as indicated at 24, 25, 2G, 27,

v28 and 29, all of said wedge faces being in tially hollow cube and vWithin the cube unit thus formed is disposed the release spring D.

The bolt'E extends through suitable en 'foretions in the end Walls of the memoera C and the boss 3() formed on the resi.' of the casting' A. The head ofthe bolt is sented in a suitable socket formed in the outer member C and the nut et' the bolt is seated Within the boss 30 and in actual practice, the bolt will be suiliciently tightened so :is to place both the spring B and spring D under an initial compression. fr

ln actua-l construction, the two members C will he so made that, in normal position of the parte, they will not form an exact cli-be oifjljrisin but on the contrary, will form a unit which conforms in cross section to the cross section of the slicl 15 when the end wall 20 of one element C is extended outwardly slight-lybeyond the adjacent triangiilar wall 21 of the other element C et the oiitcr cnil of the iiiecininisrn. 1Vith this construction, upon inward movement of the draw bar, pressure will be transmitted to the outer face 20 or' one member C end force the latter rearwardly with a wedging' action against the other element C, with a tendency lto expand the cross section of the fric tional unityq thus forcing the two friction faces of euch. element C into irictionalY engageincnt with the adjacent. corresponding friction. faces of the shell l5. The ent-ire frictional unit will be resisted by the main spring B and is the two frictional elements slide, relativelywith respect to each other, the preliminary spring D will be compressed within the friction'unit. Consequently, upon release of the pressure freni the draw bar, the spring D will expand sufficiently to shift the friction elements C relatively to each other Vand thereby permit the return ofthe parts to normal position under the influence of the main spring B,

Although l halve herein shown and ldescribed what .i now considerI the preferred manner of carrying out theinvention, the saine is merely illustrative and I contem-Y plate all changes and modifications that come within the'scope of the claims appended hereto. y'

l claim:

l. In. a lfriction' shock absorbing mecha-- nism, the combination `with a friction shell .of poiy'gonal cross section, of a main spring resistante and ffriction unit of prismatic form eoperable with said shell, said prisniatic unit including" tWo elements relatively movable and having coacting Wedge faces, all of sa'idfaccs being located in a common plane intersecting every fece of the prismatic unit, j

2. In a friction shock absorbing mechanism, the combination with a friction shell of polygonal cross section and having a plu rality of interior fiat friction faces, of a main spring` resistance, anda hollow friction unit Within said shell, said unit being, of polygonal cross section corresponding to the cross section of the shell and having a plurality of exterior flat friction faces coperable with those of the shell, said unit having a release spring therewithin, theV unit comprising a plurality of elements relatively slidable and provided each With wedge faces, all of said wedge faces being' in a common plane.4

3. In a friction shock absorbing mechanism, the combinationwith acastinp; having a friction shell at one end thereof, the shell being of substantially `rectangular cross section and providing four interior fiat friction faces, of a main 'spring .resistance disposed Within said; casting, and a hollow friction unit coperable With said shell, said hollow unit comprising tWo friction elements, each element having' a pair of friction faces ,and a plurality of Wedge faces, the friction faces coperating with those-ofthe shell andthe ,Wedge faces coperating with-each other, and 'a release spring;r Within said elements.

In witnessl that I'clairnthe foregoing I have hereunto subscribed my name this V9th day of Sept., 1918. l

v JOHN F.- OCONNOR. 

